‘80 GS1000G Dies after backfire when decelerating. Engine runs great when in the center stand. Dies when riding after I decelerate (engine brake) and it pops a couple backfires. After a minute or two, will start up and run enough to hobble home.
Stock everything except for the coils.
New Dyna coils, leads, and caps.
New NGK plugs gapped to 29. Look healthy, not fouled or lean.
New oil/air filters.
New Carb Airbox manifolds. Intake manifolds are in good shape.
Complete tear down, dip, and clean of the carbs.
Fuel mixture screws around 2.5-3 turns out after tuning.
CarbTune synced.
Floats are set at 22mm.
Rebuilt petcock.
I found a post from years back with the same issues, but there was never any real answers.
​​​​​​​Returned
Stock everything except for the coils.
New Dyna coils, leads, and caps.
New NGK plugs gapped to 29. Look healthy, not fouled or lean.
New oil/air filters.
New Carb Airbox manifolds. Intake manifolds are in good shape.
Complete tear down, dip, and clean of the carbs.
Fuel mixture screws around 2.5-3 turns out after tuning.
CarbTune synced.
Floats are set at 22mm.
Rebuilt petcock.
I found a post from years back with the same issues, but there was never any real answers.
​​​​​​​Returned